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Questions tagged [imap]

IMAP stands for Internet Message Access Protocol and is the other e-mail protocol along with POP.

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Unable to set up Outlook with local IMAP (dovecot) host on Mac [migrated]

I am trying to configure Outlook 365 (version 16.22.1) on Mac High Sierra (10.13.6). The Mac is a domain member on a Windows Active Directory domain. Our office has a self-hosted IMAP mail server ...
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Dovecot fails to authenticate for some users

I've the typical Dovecot + Postfix setup, with Apache and Roundcube (in a VPS). Yesterday I set up everything, and it went smooth. Right, but today I woke up with the surprise that some users simply ...
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Forcing SYN packet check results in unexpected results

As per the article on nixCraft This iptables rule(s): iptables -A INPUT -p tcp ! --syn -m state --state NEW -j DROP -A INPUT -j sanity -A sanity -p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -m ...
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1answer
28 views

Outlook as a lightweight IMAP client

Is it possible to configure Outlook (Version 1812, part of Office 365) as an IMAP client without downloading everything in Drafts, Sent, Spam, Trash? Starting from a clean profile, I add a user, and ...
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1answer
29 views

Best way to restrict/manage PHP apps to use my postfix?

I want to allow PHP apps to send mail but under very restricted conditions. And I don't want to allow sendmail-like command for PHP apps (I'm using chrooted PHP and it's too much headache), thus I ...
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51 views

Dovecot IMAP authenticating proxy using Kerberos/GSSAPI

I'm trying to set up Dovecot as authenticating reverse proxy, in front of an already running IMAP server to accomplish the following: Have Dovecot authenticate users using Kerberos/GSSAPI (to allow ...
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26 views

Virtual unified inbox in dovecot

I have a wildcard alias for my domain @foo.bar root@foo.bar and a sieve filter which moves mails to the folder INBOX.${alias}. require ["variables", "fileinto", "regex"]; if address :matches "to" ...
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1answer
67 views

No package php-imap available on CentOS 6

I'm running a dedicated server with CentOS 6 64bit, here is the output when trying to install IMAP: [root@localhost ~]# yum install php-imap Loaded plugins: fastestmirror Loading mirror speeds from ...
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95 views

IMAP connections from Microsoft IP addresses when using Outlook

I run a Linux based mail server and use Dovecot to provide IMAP over TLS access. This server has been up and running for a bit more than 8 years now and it serves my email address along with those of ...
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40 views

What is right way to migrate mails from Gmail to Dovecot with doveadm-backup?

Dovecot doc is far from being perfect, thus I'm little bit confused what is right way to get mails from Gmail to local Dovecot. See: https://wiki.dovecot.org/Migration/Gmail After some struggle I ...
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1answer
35 views

SPF Outlook Web App (OWA) undeliverable email

PROBLEM: Outlook.com web app (OWA), synchronized with my local server via IMAP and SMTP(STARTTLS), returns "Undeliverable message" for all messages sent. PROPOSAL: (rejected) This returning message ...
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how to do basic IMAP setup / troubleshooting in Exchange 2013

So I've had an Exchange Server (v2013 with cu21) running on a Windows Server 2012 R2 box for several years now, without many problems. We almost exclusively use Outlook-Exchange integration and ...
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1answer
78 views

Recovering deleted plain text (emails) files from raw disk image

I'm hosting my own linux mail server for my family. Yesterday my father lost all the mails in his Inbox folder. I'm still not sure whether it's due to a terrible user error or compromised password, ...
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1answer
74 views

Postfix DDoS mitigation: how to whitelist IPs for IMAP access to a single mailbox

Does (Zimbra using) Postfix have an option to whitelist IPs or domains for IMAP logins for a specific mailbox only? This is what we would like to achieve: all IPs can open an IMAP connection on port ...
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2answers
126 views

Dovecot imap-login: confusing error? message

I am busy setting up a mailserver with postfix, dovecot and mariadb on a Debian 9 system. Receiving mail fails on port 993 as result of a time-out with this message in/var/log/dovecot.log: imap-...
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1answer
50 views

Outlook and Thunderbird connecting to IMAP server where mail has been deleted

Have a rebuilt IMAP mail server which is missing emails for a time period. I have tried to search but only found articles about migration. Question is, will outlook and thunderbird etc sync such ...
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2answers
82 views

Why isn't disk space reduced after deleting mails through IMAP with Dovecot?

I'm running an email server with OpenSMTPD and Dovecot on Linux and accessing emails using IMAP with a Thunderbird client. When I delete an email in Thunderbird, why doesn't disk space usage go down? ...
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1answer
36 views

Cyrus IMAP mailbox replication. Is it encrypted over the WAN?

Servers are both Debian 9. According to Debian package search they are version 2.5.10. I need to find out if replication as described here Cyrus Documentation: Replication is encrypted over the WAN. ...
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189 views

IMAP to Office 365 migration error

I am migrating mailboxes from an on-premise IMAP server to Office 365. Most of the accounts are migrating fine, but I'm hitting the following error on a handful of accounts. Error: ...
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2answers
176 views

Webmail via imap unix socket - good idea or not?

I'm slowly setting up an email system on a Centos 7 server. The particular software I'm using will consist of postfix, dovecot and roundcube, although my question isn't specific to them (I think). I'...
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3answers
418 views

Dovecot imap send spam to junk

I am using Ubuntu 18.04 64 bit dovecot 2.2.33.2 spamassassin 3.4.1 amavisd The goal is to run an e-mail server, which I achieved already. I can access the e-mails at the server using Thunderbird ...
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312 views

HAProxy - IMAP, SMTP, POP3 - Multiple Servers

Please accept my apologies if this is off topic or does not apply on a more broad scale (i've searched the internet and can't seem to find a solution anywhere). I'm not sure if this is even possible, ...
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2answers
79 views

Cyrus - Fix quota usage

I have a mail infrastructure running on Cyrus (2.5.10), Postfix (2.7.1) and Perdition (1.19). Recently many users have been complaining about their quota usage being displayed wrongly. When trying ...
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1answer
314 views

Can't login to IMAP/POP3 server external

I have installed Postfix, Dovecot and MySQL via this tutorial (https://www.linode.com/docs/email/postfix/troubleshooting-problems-with-postfix-dovecot-and-mysql/). When I do the following command, I ...
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231 views

Dovecot SSL Failure (Postfix Working Fine)

We're trying to connect an e-mail client to our mail server. We have postfix and Dovecot configured and running on ubuntu. We can see that Dovecot is listening on the correct port using: $ sudo ...
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3answers
362 views

Are CNAME “imap…” and “smtp…” subdomains needed?

I'm running my Postfix email server. I have only 1 A dns record for it: mail.my_domain.com I'm able to connect to it, receive and send email through it using only this url. Namely, I don't have "smtp.....
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1answer
1k views

Login Fail for IMAP on Exchange Server 2016

I have deployed Exchange Server 2016. I am able to send email over 587 while I face Login failure over IMAP 993 and POP3 995. Over Microsoft Tool https://testconnectivity.microsoft.com/ IMAP Test ...
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0answers
153 views

FreeBSD Postfix Dovecot Roundcube - unable to login from Roundcube

i'm recieving such error : IMAP Error in /usr/local/www/apache24/data/roundcube/program/lib/Roundcube/rcube_imap.php (196): Login failed for test1@example.com from 1.2.3.4. AUTHENTICATE PLAIN: * OK ...
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0answers
307 views

Roundcube IMAP log — NO [AUTHENTICATIONFAILED] Authentication failed

system: Ubuntu 17.10 This is the error I am getting when trying to log in log-file /var/lib/roundcube/logs/imap: [17-Apr-2018 22:03:13 -0700]: <3aedeusd> [1116] S: * OK [CAPABILITY IMAP4rev1 ...
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290 views

Dovecot and deduplication based on the email message content, not the dovecot's Id

Problem I have an IMAP-only server and I want it to automatically de-duplicate messages. I am unable to make dovecot remove copies of "identical messages" based on their content. PD: I only need to ...
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104 views

How to escape characters in IMAP mailbox names?

I'm connecting to an IMAP server that uses . as the mailbox hierarchy delimiter. The mailbox names follow the schema "Other Users.login.Drafts", where "login" is replaced with a Linux user name. In ...
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150 views

Thunderbird sub folders grayed out after migrating to new mail server (postfix,dovecot,docker)

I migrated my old mail server (postfix,dovecot,...) to a new one (same services but with docker). In addition I changed the mail dir of the single account from .../domain.tld/name/Maildir to .../...
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1answer
175 views

IMAPCopy - Bad or invalid system flag \RECENT

I'm using IMAPCopy 1.04. During the copy process I get the following errors for many messages: Bad or invalid system flag \RECENT (messages with this error are not copied at all) What does it mean ...
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1answer
50 views

imap-login director is not restarted after each auth request

imap-login by default in dovecot mail server is restarted after every login request keeping security in mind to avoid leak of critical data. But in a director config, the imap-login director process ...
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1answer
186 views

DNS SRV records for IMAP are not seen or used

To the best of my knowledge, the below DNS records should work as a failover for my mail servers: example.com A 192.0.2.1 3600 www.example.com A 192.0.2.1 3600 ftp.example.com A ...
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1answer
316 views

Getting error with dovecot when authenticating user (Home directory not set for user)

I am trying to set up a relatively basic postfix/dovecot IMAP/SMTP server with a MySQL backend. It appears that the authentication is successful, I just seem to be getting this error: Initialization ...
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1answer
44 views

Is it possible to use a mail relay as a proxy from one port to another?

We have a server that needs to connect to an IMAP server outside of our network. Unfortunately, the server we need to connect to requires a connection on port 993. The problem is our host blocks port ...
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1answer
120 views

Timeout when connecting to remote imap server

I have a google compute cloud VM (Ubuntu 17.10) and I am trying to setup a mail daemon. I have installed postfix and dovecot according to this article (all steps followed exactly, from a fresh install)...
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2answers
898 views

How to make dovecot and postfix use the same mail directory

I'm trying to configure postfix and dovecot to connect to the same LDAP, and I kind of succeeded. But now, I have some discrepencies. The reproduction is as: I connect to dovecot in IMAP with ...
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1answer
314 views

cyradm delete mailbox permission denied

I have a new ClearOs 7 system. It has Cyrus IMAP installed. In trying to copy the mailboxes from the old server, I seem to have screwed up one of them. It has a folder called Junk E-mail which is only ...
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3answers
3k views

Dovecot cant connect to imaps 993

I am trying to set up a mail server in digitalocean VPS. The problem is that i cant telnet to 993 although firewall is inactive and dovecot is listening. Please tell me where i do wrong. I followed ...
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0answers
50 views

Forward unencrypted imap traffic into TLS-enabled?

Specifically in this example, I'm looking toward the ProtonMail Bridge, which will soon be available for Linux. For those unaware, this sets up a local imap server that decrypts your mail and allows ...
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2answers
944 views

IMAP how to login with AUTH=LOGIN in console with OpenSSL

I have seen some servers that returns AUTH=LOGIN when I request the CAPABILITY of the IMAP server e.g: 1 CAPABILITY CAPABILITY IMAP4 IMAP4rev1 AUTH=LOGIN AUTH=PLAIN AUTH=XOAUTH2 SASL-IR ...
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1answer
227 views

How to copy mail data from Mac OS X Server 5.3.1 to New Server 5.3.1

We have a Mac OS X Server v5.3.1 that has been failing, but we have many good backups. As a matter of fact, the internal HDD had failed and we are currently running off of an image on a bootable ...
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1answer
61 views

How does Outlook cope with IMAP server change (MX)

What happens with an Outlook local inbox when there happens to be an IMAP server change (MX change) and the new IMAP server/mailbox is blank? Will Outlook retain already downloaded messages in it's ...
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1answer
79 views

Local email delivery to (remote) IMAP server

I need to deliver incoming mail from my local MTA into a (remote) IMAP mailbox. Is there a tool which can do that? I cannot deliver the mail via SMTP because the remote system's spam filters etc. are ...
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1answer
28 views

Exchange combined with another provider using imap

Given a mail infrastructure on a shared hosting environment using ~10 main email inboxes and ~30 email inboxes for other purposes, all via IMAP. We now want to migrate to Microsoft Exchange (using ...
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0answers
58 views

Gmail & GoDaddy - How to AMEND email settings?

I have no idea where else to turn to ask this! Stack Overflow admins sent me your way. I recently transfered a domain away from one host over to GoDaddy.com, and the person i did this for uses gmail ...
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2answers
690 views

Mailbox on-the-fly decryption (dovecot)

To avoid casual mailbox snooping for an IMAP server I am thinking of "transparent encryption" setup that would: Public key encrypt incoming messages at local delivery time Private key decrypt said ...
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1answer
157 views

How do the servers mark the email as read

I'm looking to know how servers mark emails as read and unread with IMAP or POP. I've logged into my server (using cPanel) and navigated to my mail directory and downloaded the same email file, ...